问题
Attempting to make a fairly generic Sankey diagram with the help of R's networkD3
package. Just for reference--here's the example from the package's manual
library(networkD3)
library(jsonlite)
library(magrittr)
energy <- "https://cdn.rawgit.com/christophergandrud/networkD3/master/JSONdata/energy.json" %>%
fromJSON
sankeyNetwork(Links = energy$links,
Nodes = energy$nodes,
Source = "source",
Target = "target",
Value = "value",
NodeID = "name",
units = "TWh",
fontSize = 12,
nodeWidth = 30)
which results in:
My fairly straightforward extension consists of building a diagram with the following underlying data:
links <- structure(list(source = structure(c(1L, 2L, 3L, 1L, 2L, 3L, 4L,
5L, 4L, 5L),
.Label = c("1", "2", "3", "4", "5"),
class = "factor"),
target = structure(c(1L, 1L, 1L, 2L, 2L, 2L, 3L, 3L, 4L,
4L),
.Label = c("4", "5", "6", "7"),
class = "factor"),
value = c(88L, 774L, 1220L, 412L, 5335L, 96L, 3219L,
1580L, 111L, 7607L)),
row.names = c(NA, 10L),
class = "data.frame",
.Names = c("source", "target", "value"))
nodes <- structure(list(lab = c("A", "B", "C", "D", "E", "F", "G")),
row.names = c(NA, -7L),
.Names = "lab", class = "data.frame")
with this simple application chosen so that my data most closely reflects the manual example. When I run the comparable function, though:
sankeyNetwork(Links = links,
Nodes = nodes,
Source = "source",
Target = "target",
Value = "value",
NodeID = "lab")
Nothing happens. What's my mistake?
回答1:
This works fine if you start numbering your source
and target
at 0
:
# First coercing elements of links to numeric, so that we can subtract 1
links[] <- lapply(links, function(x) as.numeric(as.character(x)))
links[, 1:2] <- links[, 1:2] - 1
sankeyNetwork(links, nodes, 'source', 'target', 'value', NodeID='lab')
来源:https://stackoverflow.com/questions/34571899/sankey-diagram-in-r